Soluble ball seat sealing structure

Abstract

The soluble ball seat sealing structure comprises a ball seat and a pushing ring, a sealing opening is formed in the lower portion of the inner side of the ball seat, a lifting opening is formed in the upper portion of the inner side of the ball seat, a sealing ball is arranged in the lifting opening in a sleeved mode, and the upper end and the lower end of the sealing ball are sleeved with an upper pushing ring and a lower pushing ring respectively. A connecting ring is fixedly connected between the two sides of the upper pushing ring and the two sides of the lower pushing ring, a plurality of sliding grooves are formed in the inner wall of the ball seat, positioning rods are slidably connected into the sliding grooves, control grooves are formed in the upper sides and the lower sides of the sliding grooves, sliding rods are fixedly connected into the sliding grooves, and second connecting lugs are slidably connected to the outer sides of the sliding rods. The second connecting lug is fixedly connected with the positioning rod, a second spring is fixedly connected between the second connecting lug and the control groove, a plurality of sets of communicating holes right facing the positioning rod are formed in the lower portion of the pushing ring, the sealing ball can be connected into the ball seat, and the sealing ball can be automatically inserted into the ball seat to achieve sealing after the ball seat is in place.

Description

Technical Field

[0001] This utility model relates to the field of soluble ball seat technology, specifically a soluble ball seat sealing structure. Background Technology

[0002] Soluble ball seats are key tools used in petroleum engineering for staged fracturing. Their core feature is that they are made of soluble materials and can dissolve on their own after the fracturing task is completed, eliminating the need for subsequent drilling operations.

[0003] Existing soluble ball seats mostly adopt a sealing method in which the sealing ball is introduced separately. When the sealing ball is introduced by pumping or dropping, the impact force generated by the high-speed fluid will cause wear or even deformation of the ball surface. In horizontal wells or well sections with deformed casing, it is difficult to guarantee the geometric alignment between the ball seat and the sealing ball. Utility Model Content

[0004] The purpose of this invention is to provide a soluble ball seat sealing structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a soluble ball seat sealing structure, comprising a ball seat and a pushing ring. A sealing port is provided at the lower inner side of the ball seat, and a lifting port is provided at the upper inner side of the ball seat. A sealing ball is fitted inside the lifting port. An upper pushing ring and a lower pushing ring are respectively fitted at the upper and lower ends of the sealing ball. A connecting ring is fixedly connected between the upper and lower pushing rings on both sides. Several sets of sliding grooves are provided on the inner wall of the ball seat. A positioning rod is slidably connected inside the sliding groove. Control grooves are provided on the upper and lower sides of the sliding groove. A sliding rod is fixedly connected inside the control groove. A second lug is slidably connected to the outer side of the sliding rod. The second lug is fixedly connected to the positioning rod. A second spring is fixedly connected between the second lug and the control groove. The second spring is fitted outside the positioning rod. Several sets of connecting holes facing the positioning rod are provided at the lower part of the pushing ring.

[0006] Preferably, the ball seat has two sets of lifting grooves communicating with the lifting port inside. A lifting rod is fixedly connected inside the lifting groove. A first lug is slidably connected to the outside of the lifting rod. The first lug is fixedly connected to the upper push ring. A first spring is fixedly connected between the lower part of the first lug and the lifting groove. The first spring is sleeved on the outside of the lifting rod.

[0007] Preferably, the lower part of the lifting port has an embedding groove facing the downward pushing ring.

[0008] Preferably, the ball seat has a storage groove inside, a lifting ring is slidably connected inside the storage groove, a third spring is fixedly connected between the lower part of the lifting ring and the inner wall of the storage groove, and several sets of connecting wings facing the positioning rod are fixedly connected to the upper part of the lifting ring.

[0009] Preferably, the lower part of the push ring has a second inclined platform, and the upper part of the connecting wing has a first inclined platform that cooperates with the second inclined platform.

[0010] Preferably, the positioning rod has a rounded head on its outer side.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model, when the pushing ring is sleeved on the outside of the ball seat and pushes the ball seat into the pipeline, the positioning rod abuts against the lower part of the lower pushing ring, which can prevent the sealing ball from falling into the sealing port and ensure the continuity of the ball seat. At this time, the pushing ring abuts against one end of the positioning rod, and the second ear stretches the second spring. When the ball seat is in place, the pushing ring disengages from the ball seat. When the positioning rod is facing the connecting hole, the second spring pulls the second ear, so that the positioning rod enters the sliding groove, unlocking the lower pushing ring. The first spring pulls the first ear, and the upper pushing ring pushes the sealing ball downward, so that the sealing ball can be smoothly inserted into the sealing port. It can connect the sealing ball in the ball seat and automatically insert it after the ball seat is in place to achieve sealing.

[0013] 2. This utility model also features a connecting wing that contacts the positioning rod after the sealing ball has completely fallen, and pushes the positioning rod into the lifting port again, where it abuts against the upper part of the upper pushing ring. The connecting wing itself is made of plastic and can be bent outward, which can lock the position of the sealing ball and fix the position of the ball seat in the pipeline. Attached Figure Description

[0014] Figure 1 This is a first-person perspective three-dimensional structural perspective view of the present invention;

[0015] Figure 2 This is a second-view three-dimensional structural cross-sectional view of the present invention;

[0016] Figure 3 This is an enlarged view of the third-view positioning rod structure of this utility model.

[0017] In the diagram: 1. Ball seat; 2. Sealing port; 3. Lifting port; 4. Upper pushing ring; 5. Connecting ring; 6. Lower pushing ring; 7. Sealing ball; 8. First lug; 9. Lifting groove; 10. Lifting rod; 11. First spring; 12. Embedding groove; 13. Sliding groove; 14. Positioning rod; 15. Control groove; 16. Second lug; 17. Sliding rod; 18. Second spring; 19. Round head; 20. Storage groove; 21. Third spring; 22. Lifting ring; 23. Connecting wing; 24. First inclined platform; 25. Pushing ring; 26. Connecting hole; 27. Second inclined platform. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 This utility model provides a technical solution: a soluble ball seat sealing structure, including a ball seat 1 and a pushing ring 25. A sealing port 2 is provided on the lower inner side of the ball seat 1, and a lifting port 3 is provided on the upper inner side of the ball seat 1. A sealing ball 7 is fitted inside the lifting port 3. When the sealing ball 7 falls into the upper part of the sealing port 2, the ball seat 1 is sealed. An upper pushing ring 4 and a lower pushing ring 6 are respectively fitted on the upper and lower ends of the sealing ball 7. A connecting ring 5 is fixedly welded between the upper pushing ring 4 and the lower pushing ring 6 on both sides. The upper pushing ring 4 and the lower pushing ring 6 position the sealing ball 7. Several sets of sliding grooves 13 are provided on the inner wall of the ball seat 1. A positioning rod 14 is slidably installed inside the sliding groove 13. Control grooves 15 are provided on the upper and lower sides of the sliding groove 13. A sliding rod 17 is fixedly welded inside the control groove 15. A second lug 16 is slidably installed on the outer side of the sliding rod 17. Ear 16 is fixedly welded to positioning rod 14. A second spring 18 is fixedly welded between second ear 16 and control groove 15. The second spring 18 is sleeved on the outside of positioning rod 14. The lower part of push ring 25 has several sets of connecting holes 26 facing positioning rod 14. When push ring 25 is sleeved on the outside of ball seat 1 and pushes ball seat 1 into the pipeline, positioning rod 14 abuts against the lower part of push ring 6, which can prevent sealing ball 7 from falling into sealing port 2 and ensure the connectivity of ball seat 1. At this time, push ring 25 abuts against one end of positioning rod 14, second ear 16 stretches second spring 18. When ball seat 1 is in place, push ring 25 disengages from ball seat 1. When positioning rod 14 is facing the connecting hole 26, second spring 18 pulls second ear 16, so that positioning rod 14 enters sliding groove 13, unlocking lower push ring 6, so that sealing ball 7 can fall into sealing port 2.

[0020] The ball seat 1 has two sets of lifting grooves 9 communicating with the lifting port 3. A lifting rod 10 is fixedly welded inside the lifting groove 9. A first lug 8 is slidably installed on the outside of the lifting rod 10. The first lug 8 is fixedly welded to the upper pushing ring 4. A first spring 11 is fixedly welded between the lower part of the first lug 8 and the lifting groove 9. The first spring 11 is sleeved on the outside of the lifting rod 10. When the positioning rod 14 disengages from the lower part of the lower pushing ring 6, the first spring 11 pulls the first lug 8, causing the upper pushing ring 4 to push the sealing ball 7 downwards, allowing the sealing ball 7 to smoothly insert into the sealing port 2. The lower part of the lifting port 3 has an embedding groove 12 directly opposite the lower pushing ring 6. The lower pushing ring 6 enters the embedding groove 12, ensuring that the sealing ball 7 can tightly press against the upper part of the sealing port 2. The ball seat 1 has a storage groove 20 inside. A lifting ring 22 is slidably installed inside the storage groove 20. The lower part of the lifting ring 22 is connected to the storage groove 20. A third spring 21 is fixedly welded between the inner walls. Several sets of connecting wings 23 facing the positioning rod 14 are fixedly welded to the upper part of the lifting ring 22. When the pushing ring 25 disengages from the ball seat 1, the third spring 21 pushes the lifting ring 22 upward. When the sealing ball 7 falls completely, the connecting wings 23 contact the positioning rod 14 and push the positioning rod 14 into the lifting port 3 again, and abut against the upper part of the upper pushing ring 4 to lock the sealing ball 7. The connecting wings 23 themselves are made of plastic and can be bent outward to ensure the positioning of the ball seat 1 in the pipeline. A second inclined platform 27 is opened at the lower part of the pushing ring 25, and a first inclined platform 24 that cooperates with the second inclined platform 27 is opened at the upper part of the connecting wings 23 to ensure that the pushing ring 25 can smoothly push the connecting wings 23 downward when inserted into the ball seat 1. A round head 19 is provided on the outer side of the positioning rod 14 to ensure that the connecting wings 23 can push the positioning rod 14 inward.

[0021] Working principle: When this utility model is in use, when the pushing ring 25 is sleeved on the outside of the ball seat 1 and pushes the ball seat 1 into the pipeline, the positioning rod 14 abuts against the lower part of the lower pushing ring 6, which can prevent the sealing ball 7 from falling into the sealing port 2 and ensure the continuity of the ball seat 1. At this time, the pushing ring 25 abuts against one end of the positioning rod 14, and the second lug 16 stretches the second spring 18. When the ball seat 1 is in place, the pushing ring 25 disengages from the ball seat 1. When the positioning rod 14 is directly opposite the connecting hole 26, the second spring 18 pulls the second lug 16 to position the ball seat 1. Rod 14 enters the sliding groove 13, unlocking the lower push ring 6. The first spring 11 pulls the first lug 8, and the upper push ring 4 pushes the sealing ball 7 downward, allowing the sealing ball 7 to be smoothly inserted into the sealing port 2. When the sealing ball 7 has completely fallen, the connecting wing 23 contacts the positioning rod 14 and pushes the positioning rod 14 into the lifting port 3 again, and abuts against the upper part of the upper push ring 4 to lock the sealing ball 7. The connecting wing 23 itself is a plastic structure and can be bent outward to ensure the positioning of the ball seat 1 in the pipeline.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dissolvable ball seat seal structure comprising a ball seat (1), a push ring (25), characterized in that: The lower part of the ball seat (1) is provided with a sealing port (2), the upper part of the ball seat (1) is provided with a lifting port (3), the lifting port (3) is provided with a sealing ball (7), the upper and lower ends of the sealing ball (7) are provided with an upper push ring (4) and a lower push ring (6), the upper push ring (4) and the lower push ring (6) are fixedly connected between the two sides of the connecting ring (5), the inner wall of the ball seat (1) is provided with a plurality of sliding grooves (13), the sliding grooves (13) are slidably connected with positioning rods (14), the upper and lower sides of the sliding grooves (13) are provided with control grooves (15), the control grooves (15) are fixedly connected with sliding rods (17), the outer side of the sliding rods (17) is slidably connected with second ears (16), the second ears (16) are fixedly connected with the positioning rods (14), the second ears (16) and the control grooves (15) are fixedly connected with second springs (18), the second springs (18) are sleeved on the outer side of the positioning rods (14), and the lower part of the push ring (25) is provided with a plurality of communication holes (26) opposite to the positioning rods (14).

2. The dissolvable ball seat seal structure of claim 1, wherein: The inner part of the ball seat (1) is provided with two groups of lifting grooves (9) communicated with the lifting port (3), the lifting grooves (9) are fixedly connected with lifting rods (10), the outer side of the lifting rods (10) is slidably connected with first ears (8), the first ears (8) are fixedly connected with the upper push ring (4), and the lower part of the first ears (8) and the lifting grooves (9) are fixedly connected with first springs (11), the first springs (11) are sleeved on the outer side of the lifting rods (10).

3. The dissolvable ball seat seal structure of claim 1, wherein: The lower part of the lifting port (3) is provided with an embedding groove (12) opposite to the lower push ring (6).

4. The dissolvable ball seat seal structure of claim 1, wherein: The inner part of the ball seat (1) is provided with a receiving groove (20), the receiving groove (20) is slidably connected with a lifting ring (22), the lower part of the lifting ring (22) and the inner wall of the receiving groove (20) are fixedly connected with third springs (21), and the upper part of the lifting ring (22) is fixedly connected with a plurality of connecting fins (23) opposite to the positioning rods (14).

5. A dissolvable ball seat seal structure as defined in claim 4, wherein: The lower part of the push ring (25) is provided with a second inclined table (27), and the upper part of the connecting fin (23) is provided with a first inclined table (24) matched with the second inclined table (27).

6. The dissolvable ball seat seal structure of claim 1, wherein: The outer side of the positioning rod (14) is provided with a round head (19).

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